package com.cscp.javastudy.juc.unsafethread;

import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;

public class ListDemo1 {

    public static void main(String[] args) {

        /*
         * 1- List<String> list = new Vector();
         * 2- List<String> list = Collections.synchronizedList(new ArrayList<>());
         * 3- List<String> list = new CopyOnWriteArrayList<>(); //写入时复制
         * CopyOnWriteArrayList 比 Vector效率高
         */
        List<String> list = new CopyOnWriteArrayList<>();
        for (int i = 1; i <= 10; i++) {
            new Thread(() -> {
                list.add(UUID.randomUUID().toString().substring(0,5));
                System.out.println(list);
            }, String.valueOf(i)).start();
        }

    }
}
